LEPIDONOTUS CLAYA. 281 



Synonyms. 



1808. Aphrodita clava, Montagu. Trans. Linn. Soc, ix, p. 108, pi. vii, f. 3. 

 1824. Lepidonotus clavatus, Leach. Supp. Ency. Brit., i, p. 452. 

 1826. Polinoe scutellata, Kisso. Hist. nat. Burop. merid., iv, p. 414. 



1828. Eumolpe squamata, Blainville. Diet. Sc. Nat., lvii, p. 458, Atlas, f. 2. 



1829. Eurnolpe squamata, D. Chiaje. Mem. sulla Storia, iv, p. 155, tab. lvii, f. 8 and 17. 

 1836. Haliihsea clava, Templeton. Loud. Mag. X. Hist., ix, p. 234. 



1838. ? Polynoe squamata, Grube. Anat. u. Physiol. Kiemenw., p. 60, tab. ii, f. 13. 

 1840. ? „ „ (Sav.), Grube. Act. Echin. u. Wurmer, p. 87. 



1860. „ clypeata, Grube. Arch. f. Xaturges., Bd. xxvi, p. 71, taf. iii, f. 1. 



1861. „ „ Grube. Ausnug n. Trieste, p. 138, taf. iii, f. 1. 



1864. „ n Grube. Insel Lussin, p. 77. 



1865. Lepidonotus clava, Johnston. Cat. Brit. Mus., Ill, pi. iv, f. 5 and 6. 

 „ Polynoe modesta, De Quatrefages. Hist. nat. Annel., i, p. 243. 



1867. Lepidonotus clava, Malmgren. Ann. Polych., p. 130. 



1870. Polynoe grubiana, Claparede. Suppl. Annel. Chetop., 9 (373), pi. i, f. 2. 



1875. Lepidonotus clava, Marenzeller. Sitzb. der k. Akad., 1 Abth., Juli-Heft (sep. Abd.), p. 1. 



1876. „ „ Mcintosh. Trans. Z. S., ix, p. 374. 



1880. „ „ Langerhans. Zeit. f. w. Zool., xxxiii, p. 273, taf. xiv, f . 2 ? 



1881. Polynoe clava, Langerhans. Canar. Annel., Nova Acta, 42, iii, p. 108. 



1884. „ „ A. G. Bourne. Trans. Linn. Soc. Zool., ii, pp. 347 — 356, pis. xxiv — xxvi. 

 „ Lepidonatus clava, Carus. Faun. Medit., p. 202. 



1885. Polynoe grubiana, Jourdan. Zool. Anz., viii, p. 128, f. 1, 2. 



1887. „ „ , Jourdan. Arch. Zool. Exper., v, pp. 115—120, pi. iv, f. 11, 12, 16, 17. 



1898. Lepidonotus clava, De Saint-Joseph. Ann. d. Sc. nat., 8 ser., v, p. 225. 



Habitat, — This species is a southern and western form — ranging from Falmouth 

 and the Devonshire coast to Gairloch, Boss-shire, and extending to Valencia Harbour in 

 Ireland. None appear on the eastern shores. It is chiefly littoral, occurring under 

 stones in tide-pools even near high- water mark, as in McNiel's Bay, Lochmaddy, as well 

 as on oyster-beds under water. It is distributed along the shores of France to the 

 Mediterranean, Adriatic, and perhaps to the Canaries (Langerhans). 



Length about 30 mm. ; breadth 8 mm. 



Head (Plate XXXVII, fig. 4) similar in outline to that of L. squarnatus, bounded 

 posteriorly by the nuchal collar, which has the dark pigment of the dorsum on its edge. 

 The surface is smooth and iridescent, as in the former species. The eyes are visible from 

 the dorsum, the larger anterior pair in front of the middle line and wider apart, and two 

 posteriorly. Anteriorly the broad basal region of the median tentacle is more distinctly 

 separated from the bases of the lateral tentacles than in L. squamatus, and the transverse 

 diameter of the three processes is greater than in the latter species, as might be expected 

 from the larger size of all the appendages. The median and lateral tentacles are 

 proportionally thicker, and the bulbous region below the tip better marked, especially as 

 a band of blackish pigment occurs below the enlargement. A little brownish-black 

 pigment also exists on the columns of these processes and of the tentacular cirri, all these 

 organs being somewhat stouter and more boldly pigmented than in L. squamatus. The 

 palpi are somewhat filiform at the tip, and, as shown by Grube, are marked by five rows 



